Leitfaden zur electrischen Telegraphie mit Ruhestrom : (System Morse) / J. Krämer new morse code manual / A.W. Eley Leichtetes System zur Erlernung der Morseschrift auf mnemotechnischem Wege / P. Benda Morse-Telegraphen-Lesebuch / F.O. Schönherr Methods of operations research / Philip M. Morse and George E. Kimball Morse- en Spelalfabet. IK 5 Memorandum voor telegrafisten Morse- en Spelalphabet, Diensttekens, enz. VbbD nr. 2/4/1A. IK 5 How to learn the morse code in thirty minutes and remember it / Ernest Nicholson Signal Training. (All Arms). Pamphlet no.5. Procedure for Morse Telegraphy, Line Telephony and Visual Signalering. WO 7040 Signal Training. (All Arms). Pamphlet no.5. Signal Procedure. Part II. Procedure for Morse Telegraphy, Line Telephony and Visual Signalering, WO 7040 Signal Training. (All Arms). Pamphlet no.5, 1945. Procedure for morse telegraphy, Line Telefhony and Visual Signalling. WO 7040 - Signal Training. (All Arms). Pamphlet no.6. … Morse Alphabet. IK 5
